Annunciator.



O. M. LEIGH.

ANNUNGIATOR.

APPLICATION FILED MAR. 4, 1912.

1,1 16,598. v Patented Nov. 10, 1914.

2 SHEETS'SHEET l.

UNITE s rlirns PATENT orricn OSCAR. M. anon, on GENOA, imliiiois, assre di r0 cnnonnrr, LEIGH ELECTRIC Germany, or Genoa, ILLINOIS.

nnnuneinron.

Specification of Letters Patent.

Patented Nov. 10, 1914.

Application filed March 4, 1912. Serial No. 681,443.

which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates toannunciators and is of more particular advantage in connection with annunciators for telephone exchange purposes although my invention is of course not so limited. My'invention may, for instance, be very advantageously employed in the manufacture of what in the art are termed combined drops and jacks, and I have chosen for illustrating my invention herein such a combined drop and jack constructed in accordance with my inven tion. The following specific descriptionbf this drop and jack must therefore not be un-l derstood as limiting my invention, butmust be taken as illustrative, as many modifi ations within the scope of my invention may be made. In the specific form illustrated herein however, the combined drop and jack is preferably built in connection with a framework of punched material, which framework carries the operating parts with the exception of the shutter, the framework and shutter cooperating however by both being mounted upon a suitable front plate designed for their accommodation.

The combined drop and jack illustrated herein has, however, certain new magnetic features, notably the arrangement of the device in such a way that a removable coil and core may be employed whose installation may be effected without adjusting the shutter controlling armature. These and allied features however are set forth and claimed in my co-pending application Serial No. 681,442, filed March 1, 1912. The remaining novel features of the device are claimed in this present application.

My invention herein contemplates improved structural features whereby the various elements are more readily accessible and more open to inspection. In conformity herewith, askeleton framework is utilized to mount thevarious parts in such a way that little, If any, of theoperating mechanism is obscured. Further, new night bell features are shown. These and other features of my invention will be readily apparent from the construction which will now be described in connection with the accompanying drawings illustrating one form of carrying out my invention, in which:

Figure 1 is a front view of a strip of drops and jacks constructed in accordance with my invention; Fig. 2 is a top view of a portion of the strip, one individual device having its coil removed; Fig. 3 is a side view partly in section of one of my in1- proved. drops and jacks; Fig. l is a rear view of a portion of a strip of drops and jacks; Fig. 5 is a view of the coil, shell and armatureseparated to reveal their inter-relation; Fig. 6is a sectional view on lines Ar -A of Fig. 1; Fig. 7 is a View 011 line B of Fig. 3' showing the upper portion of the structure; Fig.6 is an end view of the shell; Fig. 9 is a detail of construction; Fig. lOis a sectional view on line C-C of Fig. 2; and Fig. 1.1 is a detail top view of the restoring spring. i

In accordance with my invention I provide a frontplate 1 which is adapted for mounting in a switchboard of the telephone type and which front plate carries the shuttersQ. A strip of insulation 3 rests against the rear side of this front plate 1 and insulates this plate from the various drop and jack parts mounted thereon, which parts as Wlll appear in detail are mounted upon a suitable skeleton framework 1'. This skele-- 1:011 framework is held in place upon the front plate 1 by means of the screws 5, 5 and 6, 6, which screws proJect through the front plate 1 and are insulated therefrom as will.

appear later. The framework 1 has the downwardly extending arm 7 and forwardly extending parallel arms 8, which arms 8 are bent at their forward edges parallel to the front plate 1 and are then engagedby the screws 5, 5. An armature 9 is pivoted upon a spindle 10, which spindle is mounted in the arms 8, 8. The armature 9 is provided with. an anti-sticking tip 11 rivetedthe'reto, and carries a drop shutter controlling arm 12 to be explained-more in detail later. A partition 13 is held. by means of screws 14: between the sides 8, 8 of the framework 4 by virtue of the forwardly extending arms 15 of this partition. This paraperture registering with the aperture 16. A coil 19 has a protruding core 20 adapted to project through the central aperture in the pole piece 17 and partition 13, all as explained more in detail in my said co-pending application. The core 20 has fiber end plates 21, 21, and the rear fiber end plate 21 is provided with contact terminals :22, 22 to which the terminals of the coil areconnected, these terminals being brought out through holes123, .23. A split shell-24 shown more clearly in F ig. 8 is provided for the coil 19 and is removable therewith. The coil and core are mounted tothe framework by means of an arm 25 mounted on the core between the insulating disks 26, 26, which arm 25 has aslotted extension 27 held in place by means of the screw 28 to a depending arm 29 of the framework 4. The shell 24 is cut away at 30 to accommodate the arm 25. Slotted links 31 and 32 extend respectively from the contact elements 22 to screw threaded extensions 34 and 33.

A'plate 35 extending downwardly of the framework4 carries circuit changing springs 36, 37 and 38, the screw threaded extension 33 being part of the spring 36, and the screw threaded extension 34 being part. of the spring 37. cated to form two arms 40, 40 is held by means of the rivets 41, 41 to the horizontal portion of the framework 4. This restoring spring carries an insulating lug 42.

The partition 13 has sidewardly extending.

arms 43, 43 which engage interlocking slots provided in the arms 8 so that these extensions 43 in connection with the screws 14 prevent .rotation of the partition 13. The downwardly extending plate 35 is riveted by means of the extensions 44 tov the horizontal section of the skeleton framework 4. Suitable insulation'45 is provided to insulate thesprings 36,37 and 38 from the said plate 35. The restoring spring 39 has downwardly extending arms 46, 46 which by means of the :rivets 47 hold the insulating lug 42 in place My improved removable ferrule consists of'a substantially diamond shaped plate 48 having a cylindrical extension 49 secured thereto and which projects through the opening 50 provided in the front plate for this cylindrical extension. A strip of insulation 51 is interposedbetween the plate 48 and the front plate 1. The screws 6, 6 properly insulated from the metallic parts. with the exception of the framework 4, hold this plate 48 in position. It will be seen that the cylindrical extension 49 extends through an opening in the framework 4 so that this framework does not metallically A restoring spring 39 bifuris heldinplaee "by arms 56 provided upon the plate 5.7, which plate 5.7 is held inpplace by thescrews 5. TEFheplate 57 is insulated' fromthe rfI'OIlt :plate 1 byla strip :of insulation 58 and the screws'5, being properly hushed, "also prevent .metallic contact between .the plate 57 and-the front plate v1. The strip of insulation 3 likewise serves in this connection for insulating purposes. The shutter arm 12 extends through an opening 59 inthefront plate 1 andbymeans of its latch engages the shutter 2, passing through said shutter through the opening .60. The upper portion of thisshutter right over the opening '60 is bent inwardly as shown at 61 and this maintains the shutter slightly removed from a vertical position. The arm 12has;a hump 62 so that as this arm moves-upwardly in response to the actuation of the armature 9 it tends to throw the shutter 2 outwardly. The night -ralarm contact spring 63 held in place by means of the screws 64 is-mounted upon, but insulated from,the ifront plate land has downwardly extending lugs 65, 65 which also Sare bent forwardly'to project into the opening 52 provided in the front plate. A thin contact :spring 66 held between the insulat- *in'g strip 58 and the front plate l has a downwardly extending contact element 67 which is-adapted to be engagedby the downwardly extending arms 68 of the shutter 2 so that when this arm68 engages the extension 67, this extension EiS forced into contact with the night alarmspring63, thereby closing the night alarm circuit as is well understood. It will be seen from .this that all of therparts are mounted on the skeleton framework .4 with the-exception of the shutter portions. This skeleton framework 4 is of an open character and permits inspection of allof the parts whenever the coil and shell are removed. Furthermore this framework carries the pivotally mounted armature in association with the permanently mounted polepiece and carries the springs '36, .37 and-38 in such away that these springsoccupy a vertical position to the plug, may be readily replaced by the insertion of a new portion 42. The extremely long spring action. of this. restoring spring will also be apparent and this permits a large movement for restoring purposes. All of the parts as will be apparent are insulated from the front plate 1 and the ferrule which is also a part likely to receive a large proportion of wear is readily replaceably by a new ferrule.

It will, of course, be understood that as before stated modifications may be readily made withoutdeparting from the spirit of the invention herein disclosed, the structure herein being merely illustrative.

What I therefore claim as new and desire to secure by Letters Patent is:

1. In a device of the character described the combination with a front plate, of a framework secured to said front plate, a removable coil and shell carried by said framework, a shutter structure secured to said front plate, and means for securing said shutter structure and said framework conjointly to said front plate.

2. In a device of the character described the combination with a front plate, of a framework secured tosaid front plate, a removable coil and shell carried by said framework, a shutter structure secured to said front plate, means for securing said shutter structure and said framework conjointly to said front plate, and insulating means interposed between said front plate and said framework, and shutter structure.

3. In a device of the character described, the combination with a front plate, of a framework mounted on and insulated from said front plate, said framework having a downwardly extending arm, means for attaching said arm to the front plate, said framework having two upwardly extending sides, an armature pivoted between said sides, forward extensions for said sides,

and means for securing said forward ex tensions to said front plate, said frame work forming a trough for the reception of a coil and shell.

l. A device of the character described having a front plate, a framework having two sides and a bottom and open at the top mounted to said front plate, forming a trough for the reception of a removable coil and shell, and an armature mounted an armature mounted between the sides of said framework.

6. A device of the character described having a front plate, a framework having two sides and a bottom and open at the top mounted to said front plate, forming a trough for the reception of a removable coil and shell, and a removable coil having a shell mounted on said framework.

7. A device of the character described having a front plate, a framework having two sides open at the bottom and top mounted to said front plate, a removable coil having a shell mounted on said framework, and an armature pivoted between the sides of said framework.

8. In a device of the character described, the combination with a front plate, of a framework mounted on and insulated from said front plate, a removable coil and shell two sides and a bottom and open at the top mounted to said front plate, forming a trough for the reception of a removable coil and shell, and a removable coil and shell mounted on said framework.

In witness whereof, I hereunto subscrlbe my name this 19th day of February, A. D.,

OSCAR M. LEIGH. Witnesses: O. M. WERMICH,

HAZEL J ONES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

